Noise Levels in Severna Park, MD | Find Quiet Neighborhoods With Our Sound Map
53 dBA
Average noise across Severna Park
Quiet office to normal conversation
6,749
Residents above the EPA 55 dBA threshold
25% of Severna Park residents
72 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Severna Park at 100-meter resolution, combining road, aviation, and rail sources. Green areas measure below 45 dBA. Orange and red exceed the EPA's 55 dBA outdoor threshold linked to long-term health effects. Use the layer toggles to view each source on its own or all together.
Overall
Road
Rail
Aviation
Click the map to explore
35 dBa55 dBa (EPA limit)90+ dBa
3545557090
Quietest (dBA)Loudest
Colorblind friendlyoff
What the numbers sound like
30 dBAWhisper
40 dBASoft rainfall
45 dBAQuiet suburban street at night
50 dBAQuiet office
55 dBAEPA outdoor threshold: light traffic 100 ft away
60 dBANormal conversation an arm's length away
65 dBABusy restaurant
70 dBAHighway traffic 50 ft away
80 dBACity bus interior
Population Above the EPA Outdoor Threshold
The EPA's 55 dBA outdoor reference level is a common benchmark for residential noise exposure, especially for activity interference, annoyance, and long-term community noise concerns. About 6,749 Severna Park residents, or 25.1%, live above that level. By land area, 32.4% of Severna Park is above 55 dBA.
Average noise levels for Severna Park residents, grouped by direction from the center of Severna Park. Central Severna Park carries the highest population-weighted average; Southern Severna Park carries the lowest. Just 25% of residents in Southern Severna Park live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in Central Severna Park.
Central Severna Park
56.5 dBA · Moderate-loud
Normal conversation an arm’s length away
23% of people above 55 dBA
QuietLoud
Eastern Severna Park
52.9 dBA · Moderate
Quiet office to normal conversation
22% of people above 55 dBA
QuietLoud
Northern Severna Park
51.6 dBA · Moderate
Quiet office to normal conversation
17% of people above 55 dBA
QuietLoud
Southern Severna Park
51.2 dBA · Moderate
Quiet office to normal conversation
25% of people above 55 dBA
QuietLoud
Western Severna Park
53.9 dBA · Moderate-loud
Quiet office to normal conversation
31% of people above 55 dBA
QuietLoud
Central Severna Park sounds about 44% louder than Southern Severna Park to the human ear, a 5.3 dBA gap. Every 10 dBA roughly doubles perceived loudness. Within any of these directions, two homes a quarter mile apart can still differ by 10 or more dBA depending on how close they sit to a major highway.
How far back from do you need to be?
produces an estimated 72 dBA at its loudest centerline points. Noise drops logarithmically with distance, with the exact rate depending on what's between you and the road. Tree cover, walls, terrain, and pavement type all matter. At roughly a quarter mile back, traffic fades into the noise level of a soft rainfall.
At source
72 dBA
City bus interior
165 ft
58 dBA
Normal conversation an arm’s length away
330 ft
51 dBA
Quiet office
660 ft
43 dBA
Quiet suburban street at night
¼ mile
36 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 53% of Severna Park sits under tree canopy (heavier than most cities) and roughly 20% is impervious surface like pavement and rooftops. Both are folded into the per-place decay rate above. Heavier canopy pulls noise down faster with distance; impervious surfaces slow the drop.
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Airport Noise
Baltimore/Washington International Thurgood Marshall (BWI) sits northwest of Severna Park. The U.S. Department of Transportation measures aviation noise around this airport directly, and the model uses those federal measurements rather than synthetic predictions.
Blocks under the approach and departure paths carry combined road-plus-aviation noise, with some exceeding 50 dBA on the map's Overall layer. Blocks on the opposite side of Severna Park, particularly to the southeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Severna Park
The bar chart below shows the share of Severna Park residents in each noise band. About 77% of residents live below the EPA's 55 dBA threshold, and roughly 1% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Severna Park Compares
Severna Park sits at the quieter end of the spectrum. Below: how Severna Park's average outdoor noise and share of residents above the EPA threshold compare with Pasadena, Millersville, Arnold, and Odenton.
Average noise level (dBA)
Severna Park's 52.9 dBA pop-weighted average is at the quieter end of the spectrum. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Severna Park because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 25.1% of Severna Park residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's in the middle of its peer group. Measured by land area instead, 32.4% of Severna Park's footprint sits above 55 dBA, against a Maryland average of 32.9% and a national average of 28.1%.
What This Means if You're Moving to Severna Park
Distance from highways matters more than the neighborhood name. Two homes in the same zip code can differ by 20 dBA if one sits 100 meters from and the other 500 meters away. The model captures this at 100-meter resolution, so noise exposure changes block by block.
Tree canopy can help reduce modeled noise exposure. Roughly 53% of Severna Park is under tree cover (heavier than most cities), and the dominant land cover is low-density developed open space. Both are measured from federal USDA Forest Service and USGS satellite imagery at 30-meter resolution. Streets with 60% or higher canopy show 3 to 5 dBA lower noise than comparable streets with bare ground or pavement, which is why the per-place decay rate above already accounts for it.
Airport noise is directional. Baltimore/Washington International Thurgood Marshall's approach paths concentrate aviation noise to the northwest. Neighborhoods to the southeast of downtown show no measurable contribution from the airport.
Sources & Methodology
The BestNeighborhood noise model is calibrated against nearly one million federal ground-truth measurements across four states. Road noise is computed from segment-level federal traffic data and propagated outward using physics-based acoustic decay, with attenuation rates that depend on the surrounding land cover.
All inputs are published federal datasets. Block-level noise is computed by combining road, rail, and aviation sound sources in the energy domain, the same physics used in professional environmental noise assessments. Read the full methodology.
